Split type stator structure

Abstract

The utility model relates to a split type stator structure, comprising a stator iron core which comprises two symmetrical stator iron core base bodies; a coil wound on the stator core; and each insulating frame is arranged between the corresponding coil and the corresponding stator iron core base body and covers the whole inner surface of the stator iron core base body. The stator iron core of the split type stator structure is arranged to be two symmetrical stator iron core base bodies so as to form a folding structure, the winding slot fullness rate can be improved, the output power and the torque of the motor are further improved, and independent winding can be carried out on the single stator iron core base body after the stator iron core base body is opened so as to improve the winding efficiency. And each insulating frame covers the whole inner surface of the stator iron core base body, so that electric leakage and coil abrasion can be effectively prevented.

Description

Split stator structure Technical Field

[0001] This utility model relates to the field of micro motors, and in particular to a split stator structure. Background Technology

[0002] In the design of micro motors, the stator assembly plays a crucial role. It typically consists of a stator core and coils wound around its surface. When current flows through these coils, they generate virtual magnetic poles, which interact with magnets in the mover assembly, thus driving the mover assembly to move or rotate. To ensure proper motor operation and prevent leakage and coil wear, an insulating frame, also known as stator coating, is usually installed between the stator core and the coils.

[0003] However, existing insulation frame designs have some limitations. They are typically only installed at both ends of the stator core, meaning they only cover a portion of the inner surface of the stator core. While this design can prevent leakage and coil wear to some extent, its effectiveness is not ideal. Due to the limited coverage of the insulation frame, there is still a certain risk of leakage during motor operation, which may lead to reduced motor efficiency or even damage to the motor.

[0004] Furthermore, the stator core typically employs a one-piece design, which results in a lower slot fill factor. Slot fill factor refers to the degree of filling of the coil within the slot; a lower fill factor means the coil cannot fully utilize the slot space, leading to lower motor output power and torque. This not only affects motor performance but also limits its application in certain demanding scenarios. Additionally, due to space constraints, winding efficiency is relatively low, further impacting motor production efficiency and cost.

[0005] The information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a split stator structure, which can improve the winding slot fill factor, thereby increasing the output power and torque of the motor, and also allows for individual winding of each stator core substrate after opening, thus improving winding efficiency. Each insulating frame covers the entire inner surface of the stator core substrate, effectively preventing leakage and coil abrasion.

[0007] To address the aforementioned problems, this utility model provides a split stator structure, comprising: a stator core including two symmetrical stator core substrates; a coil wound around the stator core; and two symmetrical insulating frames, each insulating frame disposed between the corresponding coil and the corresponding stator core substrate, and covering the entire inner surface of the stator core substrate.

[0008] Preferably, the insulating frame includes two parallel substrates and two symmetrical insulating members located between the two substrates; the insulating members include a first insulating plate, a second insulating plate, a third insulating plate, a fourth insulating plate, and a fifth insulating plate connected in sequence, the first insulating plate, the second insulating plate, the third insulating plate, the fourth insulating plate, and the fifth insulating plate forming an insulating frame receiving cavity; wherein, the two first insulating plates are arranged in parallel; the second insulating plate is arc-shaped and extends from a first side of the first insulating plate toward the direction close to the other insulating member; the two third insulating plates are arranged in parallel and located between the two first insulating plates; the fourth insulating plate extends from a first side of the third insulating plate toward the direction close to the first insulating plate; the fifth insulating plate extends from a first side of the fourth insulating plate toward the direction close to the other insulating member.

[0009] Preferably, the insulating member further includes a bent plate that is bent from a first side of the fifth insulating plate toward the direction of the fourth insulating plate.

[0010] Preferably, the insulating frame is provided with a through opening located between two insulating members for the stator core to pass through.

[0011] Preferably, the substrate has a first extension and a second extension on both sides to prevent the coil from becoming loose.

[0012] Preferably, the second extension is provided with an insulating magnetic focusing groove for focusing magnetism.

[0013] Preferably, one of the two stator core substrates is provided with a boss, and the other of the two stator core substrates is provided with a groove. The boss is inserted into the groove to achieve the connection of the two stator core substrates.

[0014] Preferably, the stator core substrate includes a first stator plate, a second stator plate, a third stator plate, a fourth stator plate, a fifth stator plate, and a sixth stator plate; the first stator plate and the second stator plate are arranged parallel to each other and have equal widths; the first sides of the first stator plates of the two stator core substrates are far apart from each other, and the second sides of the first stator plates of the two stator core substrates are close to each other; the first sides of the second stator plates of the two stator core substrates are far apart from each other, and the second sides of the second stator plates of the two stator core substrates are close to each other; the third stator plate is arc-shaped, and the first side of the third stator plate is connected to the first side of the first stator plate. The second side of the stator plate is connected to the first side of the second stator plate. The third stator plates of the two stator core substrates protrude away from each other. The first side of the fourth stator plate is connected to the inner surface of the middle part of the third stator plate. The fourth stator plate is parallel to the first stator plate and the second stator plate, and its width is smaller than that of the first stator plate. The fifth stator plate is arc-shaped. The first side of the fifth stator plate is connected to the second side of the fourth stator plate. The second side of the fifth stator plate extends towards the first stator plate. The upper half of the first stator plate, the third stator plate, the fourth stator plate, and the fifth stator plate... The stator first receiving cavity is formed by plates to accommodate insulating components; the stator sixth plate is arc-shaped, with its first side connected to the second side of the stator fourth plate, and its second side extending towards the stator second plate; the stator sixth plate and stator fifth plate are symmetrical about the plane containing the stator fourth plate; the stator second plate, the lower half of the stator third plate, the stator fourth plate, and the stator sixth plate form a stator second receiving cavity to accommodate another insulating component; wherein, the entire inner surface of the stator first plate is covered by the first insulating plate, and the inner surface of the upper half of the stator third plate... The entire upper surface of the fourth stator plate is covered by the second insulating plate; the entire inner surface of the fifth stator plate is covered by the third insulating plate; the entire side of the fifth stator plate is covered by the fifth insulating plate; the entire inner surface of the second stator plate is covered by the first insulating plate; the entire inner surface of the lower half of the third stator plate is covered by the second insulating plate; the entire lower surface of the fourth stator plate is covered by the third insulating plate; the entire inner surface of the sixth stator plate is covered by the fourth insulating plate; and the entire side of the sixth stator plate is covered by the fifth insulating plate.

[0015] Preferably, the first stator plate of one of the two stator core substrates is provided with the groove, and the first stator plate of the other stator core substrate is provided with the boss, so that the first stator plates of the two stator core substrates are connected; the second stator plate of one of the two stator core substrates is provided with the groove, and the second stator plate of the other stator core substrate is provided with the boss, so that the second stator plates of the two stator core substrates are connected.

[0016] Preferably, the boss is triangular, semi-circular, or rectangular, and the groove is adapted to the shape of the boss.

[0017] The stator core of this invention features a split-type stator structure with two symmetrical stator core substrates forming a mating structure. This improves the winding slot fill factor, thereby increasing the motor's output power and torque. Furthermore, it allows for individual winding of each stator core substrate after opening, enhancing winding efficiency. Each insulating frame covers the entire inner surface of the stator core substrate, effectively preventing leakage and coil abrasion.

[0018] The device of this invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and subsequent embodiments incorporated herein, which together serve to explain the particular principles of this invention. Attached Figure Description

[0019] Figure 1 is a three-dimensional structural diagram of the split stator structure of this utility model;

[0020] Figure 2 is a cross-sectional view of Figure 1;

[0021] Figure 3 is a schematic diagram of the structure of a single insulating frame;

[0022] Figure 4 is a structural schematic diagram of a single insulating frame from another perspective;

[0023] Figure 5 is a schematic diagram of the structure of the two insulating frames;

[0024] Figure 6 is a schematic diagram of the internal structure of Figure 5;

[0025] Figure 7 is a cross-sectional view of Figure 5;

[0026] Figure 8 is a three-dimensional structural diagram of the stator core;

[0027] Figure 9 is a front view of Figure 8.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Stator core; 110. Stator core base; 111. Boss; 112. Groove; 113. First stator plate; 114. Second stator plate; 115. Third stator plate; 116. Fourth stator plate; 117. Fifth stator plate; 118. Sixth stator plate; 119. First stator cavity; 120. Stator magnetic slot; 121. Second stator cavity;

[0030] 200. Coil;

[0031] 300. Insulating frame; 301. Penetration opening;

[0032] 310. Substrate;

[0033] 320. Insulating component; 321. First insulating plate; 322. Second insulating plate; 323. Third insulating plate; 324. Fourth insulating plate; 325. Fifth insulating plate; 326. Insulating frame receiving cavity; 327. Bending plate; 328. Enclosing cavity;

[0034] 331. First extension; 332. Second extension; 333. Insulating magnetic groove.

[0035] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of this invention. The specific design features disclosed in this invention (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the specific application and environment in which they will be used.

[0036] Throughout these figures, the same reference numerals denote the same or equivalent parts of the present invention. Detailed Implementation

[0037] The present invention will now be described in detail with reference to various embodiments, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present invention to these exemplary embodiments. Rather, the present invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit of the present invention and the scope defined by the appended claims.

[0038] When a component is referred to as being "above" or "on top of" another component, the component may be in contact with the other component, or the component may be spaced apart from the other component, or there may be an intermediate component between the component and the other component.

[0039] The split stator structure of the present invention will be described below with reference to Figures 1 to 9.

[0040] As shown in Figures 1 and 2, the split stator structure of this utility model includes: a stator core 100, a coil 200, and two symmetrical insulating frames 300.

[0041] The stator core 100 includes two symmetrical stator core bodies 110.

[0042] Coil 200 is wound around stator core 100.

[0043] Each insulating frame 300 is disposed between the corresponding coil 200 and the corresponding stator core substrate 110, and covers the entire inner surface of the stator core substrate 110. The insulating frame is also called stator coating.

[0044] The stator core 100 of this utility model, with its split stator structure, is configured as two symmetrical stator core substrates 110 to form a mating structure. This not only improves the winding slot fill factor, thereby increasing the motor's output power and torque, but also has a significant advantage: it can be easily opened when needed for individual winding operations on a single stator core substrate 110. This design greatly improves the efficiency of winding operations, making the production process more flexible and efficient. Each insulating frame 300 covers the entire inner surface of the stator core substrate 110, and this comprehensive coverage effectively prevents leakage. Leakage not only affects the normal operation of the motor but can also pose safety hazards. The comprehensive coverage of the insulating frame 300 ensures the safety and reliability of the motor under various working environments. Simultaneously, the design of the insulating frame 300 also protects the coils from wear, extending the motor's service life. Coil wear not only leads to a decline in motor performance but can also cause malfunctions; therefore, the protective function of the insulating frame 300 is crucial for the long-term stable operation of the motor.

[0045] The term "covering the entire inner surface of the stator core substrate 110" as mentioned here specifically refers to covering the entire inner surface of the stator core substrate 110 in the front-back direction as shown in Figure 1. In the prior art, the insulating frame 300 typically only covers the front and rear ends of the stator core substrate 110. Compared to the prior art, this comprehensive coverage measure of the present invention can effectively prevent leakage.

[0046] In an exemplary embodiment, as shown in Figures 3 and 4, the insulating frame 300 includes two parallel substrates 310 and two symmetrical insulating members 320 located between the two substrates 310.

[0047] As shown in Figures 5 to 7, the insulating component 320 includes a first insulating plate 321, a second insulating plate 322, a third insulating plate 323, a fourth insulating plate 324, and a fifth insulating plate 325 connected in sequence. The first insulating plate 321, the second insulating plate 322, the third insulating plate 323, the fourth insulating plate 324, and the fifth insulating plate 325 form an insulating frame receiving cavity 326.

[0048] As shown in Figure 7, the two first insulating plates 321 are arranged in parallel.

[0049] The second insulating plate 322 is arc-shaped and extends from the first side of the first insulating plate 321 toward the other insulating member 320. The first side of the first insulating plate 321 is the side closest to the other insulating frame 300.

[0050] Two third insulating plates 323 are arranged in parallel and located between two first insulating plates 321. The first side of the third insulating plate 323 is the side away from the second insulating plate 322 (i.e., the side closer to the other insulating frame 300), and the second side of the third insulating plate 323 is the side closer to the second insulating plate 322 (i.e., the side away from the other insulating frame 300).

[0051] The fourth insulating plate 324 extends from the first side of the third insulating plate 323 toward the first insulating plate 321. The first side of the fourth insulating plate 324 is the side away from the second insulating plate 322 (i.e., the side closer to the other insulating frame 300), and the second side of the fourth insulating plate 324 is the side closer to the second insulating plate 322 (i.e., the side away from the other insulating frame 300).

[0052] The fifth insulating plate 325 extends from the first side of the fourth insulating plate 324 toward another insulating member 320. The fourth insulating plate 324 is parallel to the first insulating plate 321 and the third insulating plate 323.

[0053] In an exemplary embodiment, as shown in Figures 6 and 7, the insulating member 320 further includes a bent plate 327, which is bent from the first side of the fifth insulating plate 325 toward the direction close to the fourth insulating plate 324, and the bent plate 327 can further improve the insulation performance.

[0054] In an exemplary embodiment, as shown in FIG5, the insulating frame 300 is provided with a through opening 301, which is located between two insulating members 320 for the stator core 100 to pass through.

[0055] In an exemplary embodiment, as shown in FIG4, the split stator structure of the present invention further includes two first extensions 331 and two second extensions 332 to prevent the coil 200 from becoming loose.

[0056] A first extension 331 and a second extension 332 extend forward from the front substrate 310, and another first extension 331 and another second extension 332 extend rearward from the rear substrate 310, with the second extension 332 located inside the first extension 331 in the radial direction.

[0057] The first extension 331 and the second extension 332 prevent the coil 200 from becoming loose. The coil 200 is ring-shaped, with its main portion housed in the insulating frame cavity 326 of the insulating member 320. A small portion of the coil 200 is disposed on the outer side of the substrate 310 in the front-rear direction, specifically between the first extension 331 and the second extension 332. Without the first extension 331 and the second extension 332, the coil on the outer side of the substrate 310 might become loose, affecting rotation. The first extension 331 and the second extension 332 prevent the coil 200 from becoming loose, thus avoiding interference with rotation.

[0058] In an exemplary embodiment, as shown in FIG4, an insulating magnetic focusing groove 333 is provided on the second extension 332 for focusing magnetism. The coil 200 generates virtual magnetic poles after being energized. The insulating magnetic focusing groove 333 is provided at the center of the second extension 332, which makes the magnetic force at the center position stronger.

[0059] In an exemplary embodiment, as shown in Figures 8 and 9, one of the two stator core substrates 110 is provided with a boss 111, and the other of the two stator core substrates 110 is provided with a groove 112. The boss 111 is inserted into the groove 112 to achieve the connection of the two stator core substrates 110.

[0060] In the same insulating frame 300, as shown in Figures 3 and 4, two parallel substrates 310 form an enclosing cavity 328 to surround the corresponding stator core substrate 110 in the front-back direction, thereby further isolating the stator core substrate 110 from the coil 200.

[0061] As shown in Figures 8 and 9, the stator core substrate 110 includes a first stator plate 113, a second stator plate 114, a third stator plate 115, a fourth stator plate 116, a fifth stator plate 117, and a sixth stator plate 118.

[0062] The first stator plate 113 and the second stator plate 114 are arranged in parallel and have the same width. The first sides of the first stator plate 113 of the two stator core base bodies 110 are far apart from each other, and the second sides of the first stator plate 113 of the two stator core base bodies 110 are close to each other. The first sides of the second stator plate 114 of the two stator core base bodies 110 are far apart from each other, and the second sides of the second stator plate 114 of the two stator core base bodies 110 are close to each other.

[0063] The third stator plate 115 is arc-shaped, with its first side connected to the first side of the first stator plate 113 and its second side connected to the first side of the second stator plate 114. The third stator plates 115 of the two stator core substrates 110 protrude in a direction away from each other.

[0064] The first side of the fourth stator plate 116 is connected to the inner surface of the middle part of the third stator plate 115. The fourth stator plate 116 is parallel to the first stator plate 113 and the second stator plate 114, and its width is smaller than the width of the first stator plate 113.

[0065] The fifth stator plate 117 is arc-shaped, with its first side connected to the second side of the fourth stator plate 116. The second side of the fifth stator plate 117 extends towards the first stator plate 113. The first stator plate 113, the upper half of the third stator plate 115, the fourth stator plate 116, and the fifth stator plate 117 form the first stator receiving cavity 119 to accommodate the insulating member 320.

[0066] The sixth stator plate 118 is arc-shaped, with its first side connected to the second side of the fourth stator plate 116. The second side of the sixth stator plate 118 extends towards the second stator plate 114. The sixth stator plate 118 and the fifth stator plate 117 are symmetrical about the plane containing the fourth stator plate 116. The second stator plate 114, the lower half of the third stator plate 115, the fourth stator plate 116, and the sixth stator plate 118 form the second stator receiving cavity 121 to accommodate another insulating member 320. The description of the upper and lower halves of the third stator plate 115 is based on the perspective shown in Figure 9 and is merely for illustrative purposes. It does not imply that the third stator plate 115 must be positioned in the direction shown in Figure 9; other orientations are possible in actual use, and this document does not limit the direction of use.

[0067] The inner surface of the first stator receiving cavity 119 is covered by an insulating member 320. Specifically, the entire inner surface of the first stator plate 113 is covered by a first insulating plate 321, the entire inner surface of the upper half of the third stator plate 115 is covered by a second insulating plate 322, the entire upper surface of the fourth stator plate 116 is covered by a third insulating plate 323, the entire inner surface of the fifth stator plate 117 is covered by a fourth insulating plate 324, and the entire side of the fifth stator plate 117 is covered by a fifth insulating plate 325. The inner surface mentioned here refers to the surface that forms the first stator receiving cavity 119.

[0068] The inner surface of the second stator receiving cavity 121 is covered by another insulating member 320. Specifically, the entire inner surface of the second stator plate 114 is covered by the first insulating plate 321, the entire inner surface of the lower half of the third stator plate 115 is covered by the second insulating plate 322, the entire lower surface of the fourth stator plate 116 is covered by the third insulating plate 323, the entire inner surface of the sixth stator plate 118 is covered by the fourth insulating plate 324, and the entire side of the sixth stator plate 118 is covered by the fifth insulating plate 325. The inner surface mentioned here refers to the surface that forms the second stator receiving cavity 121.

[0069] In an exemplary embodiment, the stator first plate 113 of one of the two stator core substrates 110 is provided with the groove 112, and the stator first plate 113 of the other stator core substrate 110 is provided with the boss 111, so that the stator first plates 113 of the two stator core substrates 110 are connected.

[0070] One of the two stator core substrates 110 has a stator second plate 114 with the groove 112, and the other stator second plate 114 has a boss 111, so that the stator second plates 114 of the two stator core substrates 110 are connected.

[0071] In an exemplary embodiment, a stator magnetizing groove 120 is provided on the side of the fourth stator plate 116 for magnetizing.

[0072] In an exemplary embodiment, the boss 111 is in the shape of a triangle, a semi-circle, or a rectangle. The shape of the boss 111 is not limited to these; it can be any form in the prior art, as long as it can achieve the above-mentioned function.

[0073] The groove 112 is adapted to the shape of the boss 111.

[0074] In an exemplary embodiment, the insulating frame 300 is made of a plastic structure.

[0075] In a specific exemplary embodiment, the stator core 100 is constructed by stacking silicon steel sheets one by one. These silicon steel sheets are precisely cut and processed to ensure that each sheet fits perfectly, forming a robust and uniform whole. This stacking method effectively reduces eddy current losses and improves the efficiency and performance of the motor. The entire process requires meticulous craftsmanship and strict quality control to ensure the quality and reliability of the final product.

[0076] For ease of interpretation and precise definition of the appended claims, the terms “upper,” “lower,” “inner,” “outer,” “above,” “below,” “above,” “below,” “upward,” “downward,” “front,” “back,” “behind,” “inner side,” “outer side,” “inward,” “outer,” “internal,” “external,” “inner,” “external,” “forward,” and “backward” are used to describe the features of the exemplary embodiments with reference to the positions of these features shown in the accompanying drawings.

[0077] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and descriptive purposes. It is not intended to be exhaustive, nor to limit the invention to the precise forms disclosed; obviously, many changes and variations are possible in accordance with the foregoing teachings. The exemplary embodiments were chosen and described to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to implement and utilize various exemplary embodiments of the invention, as well as their different alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A split-type stator structure, characterized in that, include: The stator core comprises two symmetrical stator core bodies; A coil wound around the stator core; two symmetrical insulating frames, each set between the corresponding coil and the corresponding stator core substrate, covering the entire inner surface of the stator core substrate.

2. The split stator structure according to claim 1, characterized in that, One of the two stator core substrates is provided with a boss, and the other of the two stator core substrates is provided with a groove. The boss is inserted into the groove to connect the two stator core substrates.

3. The split stator structure according to claim 2, characterized in that, The insulating frame includes two parallel base plates and two symmetrical insulating members located between the two base plates. Each insulating member includes a first insulating plate, a second insulating plate, a third insulating plate, a fourth insulating plate, and a fifth insulating plate connected in sequence, forming an insulating frame receiving cavity. The two first insulating plates are arranged in parallel. The second insulating plate is arc-shaped and extends from a first side of the first insulating plate towards the other insulating member. The two third insulating plates are arranged in parallel and located between the two first insulating plates. The fourth insulating plate extends from a first side of the third insulating plate towards the first insulating plate. The fifth insulating plate extends from a first side of the fourth insulating plate towards the other insulating member.

4. The split stator structure according to claim 3, characterized in that, The insulating member further includes a bent plate that is bent from a first side of the fifth insulating plate toward the direction of the fourth insulating plate.

5. The split stator structure according to claim 3, characterized in that, The insulating frame is provided with a through opening located between two insulating components, so that the stator core can pass through.

6. The split stator structure according to claim 3, characterized in that, The substrate has a first extension and a second extension on both sides to prevent the coil from becoming loose.

7. The split stator structure according to claim 6, characterized in that, An insulating magnetic focusing groove is provided on the second extension for focusing magnetism.

8. The split stator structure according to claim 3, characterized in that, The stator core substrate includes a first stator plate, a second stator plate, a third stator plate, a fourth stator plate, a fifth stator plate, and a sixth stator plate. The first stator plate and the second stator plate are arranged parallel to each other and have equal widths. The first sides of the first stator plates of the two stator core substrates are far apart from each other, and the second sides of the first stator plates of the two stator core substrates are close to each other. The first sides of the second stator plates of the two stator core substrates are far apart from each other, and the second sides of the second stator plates of the two stator core substrates are close to each other. The third stator plate is arc-shaped, and its first side is connected to the first side of the first stator plate. The second side of the third stator plate... The first side of the stator plate is connected to the first side of the second stator plate, and the second stator plate of the two stator core bases protrudes away from each other; the first side of the stator plate is connected to the inner surface of the middle part of the third stator plate, the fourth stator plate is parallel to the first stator plate and the second stator plate, and its width is smaller than the width of the first stator plate; the fifth stator plate is arc-shaped, the first side of the fifth stator plate is connected to the second side of the fourth stator plate, and the second side of the fifth stator plate extends towards the first stator plate; the upper half of the first stator plate, the third stator plate, the fourth stator plate, and the fifth stator plate surround each other. The stator forms a first receiving cavity to accommodate an insulating member; the sixth stator plate is arc-shaped, with its first side connected to the second side of the fourth stator plate, and its second side extending towards the second stator plate; the sixth and fifth stator plates are symmetrical about the plane containing the fourth stator plate; the second stator plate, the lower half of the third stator plate, the fourth stator plate, and the sixth stator plate form a second receiving cavity to accommodate another insulating member; wherein the entire inner surface of the first stator plate is covered by the first insulating plate, and the entire inner surface of the upper half of the third stator plate is covered by the first insulating plate. The upper surface of the fourth stator plate is completely covered by the third insulating plate, the inner surface of the fifth stator plate is completely covered by the fourth insulating plate, and the side portion of the fifth stator plate is completely covered by the fifth insulating plate; the inner surface of the second stator plate is completely covered by the first insulating plate, the lower half of the inner surface of the third stator plate is completely covered by the second insulating plate, the lower surface of the fourth stator plate is completely covered by the third insulating plate, the inner surface of the sixth stator plate is completely covered by the fourth insulating plate, and the side portion of the sixth stator plate is completely covered by the fifth insulating plate.

9. The split stator structure according to claim 8, characterized in that, One of the two stator core substrates has a first stator plate with the groove, and the other stator core substrate has a first stator plate with the boss, so that the first stator plates of the two stator core substrates are connected; one of the two stator core substrates has a second stator plate with the groove, and the other stator core substrate has a second stator plate with the boss, so that the second stator plates of the two stator core substrates are connected.

10. The split stator structure according to claim 9, characterized in that, The boss is triangular, semi-circular, or rectangular, and the groove is adapted to the shape of the boss.

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